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(No Model.)

' 2 Sheets-Sheet 1.

H. YOUNG & H. G. HUBBRT. MACHINE FOR SQOURING AND POLISHINGSTONE- I No.290,304. Patented Dec. 18, 1883.

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' (No Model.) 2 Sheets-Sheet 2,.

H. YOUNG & ELG. HUBBRT. MACHINE FOR SGOURING AND POLISHING STONE.110.290.5504. v Patented D06. 18, 1883.

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N, PETERS. mo-Limn n mr, Washinflon. II c lhyrrnn STATES PATENT 'OFFICE.

HUGH YOUNG AND H. GEN GEMBRE HUBERT, OF NEW YORK, N.

MACHINE FOR SCOURING AND POLISHING STONE.

SPECIFICATION forming part of Letters Patent No. 290,304, dated December18, 1883. V

' Application filed March 13, 1883. (No model.)

To all whom it may concern.-

Be it known that we, HUGH YOUNG and H. GENGEMBRE Hunnnn-both of the cityof New York, in the county and State of New York,

Y a great deficiency of sand on the bed, and at other times a surplus,resultingin waste of the sand, and the operation of the machineistherefore not uniform.

The object of our invention is to enable the sand and abrading materialto be fed to the bed. with greater regularity and uniformity than havebefore been possible, and in such quantities as will insure the mosteffective operation of the machine without causing a waste of sand orabrading material.

To this end our invention consists in the combination, with the rotatingbed of a stone rubbing or polishing machine, of a box or reservoir forscouring or polishing material, arranged between the center of the bedand its periphery, and composed of a body and a separated bottom, andmechanism deriving motion from the machine itself for giving one ofthese elements a movement relatively to thelother.

Between the body of the sand box or reservoir and itsseparated bottomthere is formed a delivery-opening, and as the body or bottom is movedthe one relatively to the other the sand or other material escapesthrough this delivery-opening and is supplied uniformly to the bed. Thedelivery of sand between the body and-bottom of the box or reservoirmaybe efiected by a continuous movement of the bottom in one directionand said bottom may consist of a disk or plate having a rotary motion ora reciprocating motion; or of an endless apron or belt having atraveling movement continuously in one direction below the body of thebox or reservoir; or the bottom may consist of a fixed plate and thebody have a reciprocating motion over said plate.

The constructions above described are all includedin our invention whenthe box or reservoir is located as above described, and it or itsseparated bottom derives a motion from the machine itself.

In the accompanying drawings, Figure 1 is an elevation of a portion of arotary bed and a sand-feeding apparatus embodying our invention. Fig. 2is a plan thereof, the sand box or reservoir being shown in section.Figs. 3 and 4 are respectively a vertical section and an end elevationof a sand-feeding apparatus of modified form also embodying ourinvention; and Figs. 5 and 6 are sectional views of two other modifiedforms of apparatus also embodying our invention.

Similar letters of reference designate corresponding parts in all thefigures.

WVe will first describe the apparatus shown in Figs. 1 and 2.

A designates the rubbing or polishing bed, which is usually of iron, andis fixed on a vertical shaft, A. Thisshaft is supported in an uprightposition in bearings, which are not here shown, and it is to berotatedby any suitable gearing, such as is commonly employed in rubbingor polishing beds.

B designates the frame-work of the feeding apparatus, which is supported011 or fixed to a beam or timber, B, extending across and above the bedA. This frame will of course be considerably varied in form to suit thedifferent forms of feeding apparatus which we may employ. The feedingapparatus con1- prises a sand box or reservoir composed of a body, 0,and a bottom, 0, separated from the body, so that one may have amovement independently of and relatively to the other. In this box orreservoir a supply of sand or other abrading material, a, is contained.The body 0 is to be attached to any suitable fixed supports between thecenter of the bed A and its periphery, and the bottom O,which, as shown,consists of a circular plate or disk, is fixed on a vertical shaft, D,supported in a step-bearing, 12, in the frame B.

Upon the shaft D, below the bottom 0, is

fixed a bevel-gear or wheel, 0, and d desig nates apinion engagingtherewith, and mounted on a short counter-shaft, d.

E designates a shaft journaled in the frame B, and receiving rotarymotion from a belt, E, passing over a pulley, E", upon it. This belt, ashere shown, is driven from the shaft A of the bed; but it might receivemot-ion from any other shaft.

Upon the opposite end of the shaft E is a crank, e, the crank-pin orwrist-pin of which may be adjustable to vary its throw, and this crank,by means of a rod, 0, imparts a vibratory motion to an arm, 0 looselymounted on the shaft (1.

Upon the shaft (1 is a ratchet-wheel, d", and the arm 0 carries a pawl,e, which takes into the teeth of said wheel (1 and so imparts anintermittent rotary motion continuously in one direction to the shaft(1, and through the wheels 0 d to the bottom plate, 0. Other mechanismmight be used for rotating the bottom C. The body (1 of the sand box orres ervoir is approximately circular; but in its side is represented anangular gap or recess, C in one side or wall of which is adeliveryopening, f, which is regulated by averticallymovable gate, f.The gate may be adjusted up or down to vary the size of the opening fand regulate the quantity of sand delivered, and may be secured indifferent positions by a bolt, 1", or otherwise, Except for the delivery-openingf, the lower edge of the body 0 fits quite snugly againstthe bottom 0, so that sand cannot escape in any quantity, except at saiddelivery-opening. The other wall, of the gap or recess C forms ascraper, and it is provided with a continuation or exten sion, 9. (Bestshown in Fig. 2.) As the bottom 0 turns in the direction of the arrow,Fig. 2, the sand or other abrading material escapes from the opening fin greater or less quantities, according as the opening is large orsmall, and as the sand comes against the scraper g y it is pushed offand delivered onto the bed A.

Referring now to Figs. 3 and 4, G designates the body of the sand box orreservoir, and O designates the bottom thereof. The body is intended tobe secured in a fixed position to the frame B, and the bottom here shownconsists of an endless apron or belt, which is mounted on rollers F F.

Upon the shaft of the roller F is secured a ratchet-wheel, (Z and at theside of said wheel is an arm, 0*, which carries apawl, c, engaging withthe wheel, and to which a vibratory motion is imparted by aconnecting-rod, c, which is operated from a crank, 0, upon a shaft, E.The crank-pin of this crank may be adjustably secured, as beforedescribed, so as to afford provision for varying its throw of the crank,and the shaft E derives its rotary motion from the movement of themachine itself, as before described.

In one side of the body 0 of the sand box or reservoir is adelivery-opening, 1, which is provided with an adjustable gate, f,secured in place by bolts f By adjusting this gate the quantity of sandallowed to escape may be varied, and the sand carried off by the belt orapron O is deposited in a hopper, G, which delivers it near the centerof the bed. XVe have not shown the bed in these figures; but it isarranged and operated as before described with reference to Figs. 1 and2.

Referring now to Fig. 5, C designates the body, and C the separatedbottom, of the sand box or reservoir. The bottom here shown consistssimply of a plate supported upon rollers 71, and it has a reciprocatingmotion imparted to it by a connecting-rod, c, operated by a crank, 0,upon a shaft, E, which may be rotated by any suitable gearing derivingmotion from the machine itself. The body Chas outlet-openingsf inopposite sides, which are controlled by adjustable gates f, andadja-eentto the said outlet-openings are hinged scrapers a, which actalternately to scrape the sand from the bottom 0 as it is reciprocated.

For example, as the bottom is moved toward; the right the sand escapesfrom the right-hand opening, and the left-hand scraper removes the sandand delivers it into the hopper G,

but when the bottomnioves toward the left the sand will escape from theleft-hand opening, and will be removed by the scraper on the right-handside of the body 0.

Referring now to Fig. 6, O designates the body of the sand-box, and Othe separated bottom thereof. In this example of our invention thebottom 0 is fixed and the body 0 is reeiprocated. The body is supportedon rollers or wheels 7', which run on a track, j, and is reciproeated bya rod, 0, operated by a crank, c, on a shaft, E.

In opposite sides of the body 0 are outletopenings f, and as the body ismoved it leaves the sand behind it and removes the sand in front of it,delivering it into the hopper G. V

For different situations the opening between the bottom and body of thesand-box may be varied as required, and we may employ a quick speed andlarge outlet-openings f or a slower speed and smaller openings.

The adjustable gates f afford provision for regulating these openings orclosing them en tirely.

\Ve are aware that feeding apparatus and devices of various kinds havebeen employed for feeding grain and other material to be ground orreduced through the runner of a rotary grinding-mill.

v \Ve are also aware that a sand hopper or box having an inclinedbottom, in connection with a pipe for supplying water to said hopper orbox to wash the sand out, has been applied to a rotary rubbing orpolishing bed. \Ve do not claim either of these combinations of parts asof our invention.

By our invention we deliver the sand by mechanicallyoperated devices,and do not wash it down, and as the feeding apparatus derives motionfrom the bed or machine itself,

' tively to the other, substantially as herein deits rate of feedingwill always be commensurate tion relatively to said body, substantiallyas to the speed of the machine.

We claim 1. The combination, with the rotating bed of a stone rubbing orpolishing machine, of a box or reservoir for the scouring or polishingmaterial, arranged between the center of the bed and its periphery, andcomposed of a body and a separated bottom, and mechanism deriving motionfrom the machine itself, for giving one of these elements a movementrelascribed.

2. The combination, with the rotating bed of a stone rubbing orpolishing machine, of a boX or reservoir for scouring or polishingmaterial, arranged between the center of the bed and its periphery, andcomposed of a body and a separated bottom, and mechanism deriving motionfrom the machine for giving the said bottom a movement continuously inone direcherein described.

3. The combination, with the rotating bed of a stone rubbing orpolishing machine, of a box or reservoir for scouring or polishingmaterial, arranged between the center of the bed and its periphery, andcomposed of a body and a bottom plate arranged below the lower end ofthe body, and affording a space between it and the body for the escapeof the scouring or polishing material, and mechanism deriving motionfrom the machine itself, for giving said bottom plate a rotary motioncontinuously in one direction, substantially as herein described.

HUGH YOUNG. H. GENGEMBRE HUBERT.

iVitnesses:

FREDK. HAYNES, ED. L. MORAN.

